[POWERPC] spufs: add support for nonschedulable contexts

This adds two new flags to spu_create:

SPU_CREATE_NONSCHED: create a context that is never moved
away from an SPE once it has started running. This flag
can only be used by tasks with the CAP_SYS_NICE capability.

SPU_CREATE_ISOLATED: create a nonschedulable context that
enters isolation mode upon first run. This requires the
SPU_CREATE_NONSCHED flag.

Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>

1 files changed, 4 insertions, 1 deletions

diff --git a/include/asm-powerpc/spu.h b/include/asm-powerpc/spu.h
index cac4ad90a1d4..a1cf476c66f5 100644
--- a/include/asm-powerpc/spu.h
+++ b/include/asm-powerpc/spu.h
@@ -181,8 +181,10 @@ extern struct spufs_calls {
  */
 #define SPU_CREATE_EVENTS_ENABLED       0x0001
 #define SPU_CREATE_GANG                 0x0002
+#define SPU_CREATE_NOSCHED              0x0004
+#define SPU_CREATE_ISOLATE              0x0008
 
-#define SPU_CREATE_FLAG_ALL             0x0003 /* mask of all valid flags */
+#define SPU_CREATE_FLAG_ALL             0x000f /* mask of all valid flags */
 
 
 #ifdef CONFIG_SPU_FS_MODULE
@@ -276,6 +278,7 @@ struct spu_problem {
         u32 spu_runcntl_RW;                                     /* 0x401c */
 #define SPU_RUNCNTL_STOP        0L
 #define SPU_RUNCNTL_RUNNABLE    1L
+#define SPU_RUNCNTL_ISOLATE     2L
         u8  pad_0x4020_0x4024[0x4];                             /* 0x4020 */
         u32 spu_status_R;                                       /* 0x4024 */
 #define SPU_STOP_STATUS_SHIFT           16